3 files changed, 11 insertions, 2 deletions

diff --git a/arch/arm/plat-samsung/dma-ops.c b/arch/arm/plat-samsung/dma-ops.c
index 889c2c22325e..2cded872f22b 100644
--- a/arch/arm/plat-samsung/dma-ops.c
+++ b/arch/arm/plat-samsung/dma-ops.c
@@ -24,11 +24,18 @@ static unsigned samsung_dmadev_request(enum dma_ch dma_ch,
         struct dma_chan *chan;
         dma_cap_mask_t mask;
         struct dma_slave_config slave_config;
+        void *filter_param;
 
         dma_cap_zero(mask);
         dma_cap_set(info->cap, mask);
 
-        chan = dma_request_channel(mask, pl330_filter, (void *)dma_ch);
+        /*
+         * If a dma channel property of a device node from device tree is
+         * specified, use that as the fliter parameter.
+         */
+        filter_param = (dma_ch == DMACH_DT_PROP) ? (void *)info->dt_dmach_prop :
+                                (void *)dma_ch;
+        chan = dma_request_channel(mask, pl330_filter, filter_param);
 
         if (info->direction == DMA_FROM_DEVICE) {
                 memset(&slave_config, 0, sizeof(struct dma_slave_config));
diff --git a/arch/arm/plat-samsung/include/plat/dma-ops.h b/arch/arm/plat-samsung/include/plat/dma-ops.h
index 4c1a363526cf..22eafc310bd7 100644
--- a/arch/arm/plat-samsung/include/plat/dma-ops.h
+++ b/arch/arm/plat-samsung/include/plat/dma-ops.h
@@ -31,6 +31,7 @@ struct samsung_dma_info {
         enum dma_slave_buswidth width;
         dma_addr_t fifo;
         struct s3c2410_dma_client *client;
+        struct property *dt_dmach_prop;
 };
 
 struct samsung_dma_ops {
diff --git a/arch/arm/plat-samsung/include/plat/dma-pl330.h b/arch/arm/plat-samsung/include/plat/dma-pl330.h
index 2e55e5958674..c5eaad529de5 100644
--- a/arch/arm/plat-samsung/include/plat/dma-pl330.h
+++ b/arch/arm/plat-samsung/include/plat/dma-pl330.h
@@ -21,7 +21,8 @@
  * use these just as IDs.
  */
 enum dma_ch {
-        DMACH_UART0_RX,
+        DMACH_DT_PROP = -1,
+        DMACH_UART0_RX = 0,
         DMACH_UART0_TX,
         DMACH_UART1_RX,
         DMACH_UART1_TX,